@article{Macho-Stadler1991,
	title = {Moral hazard and cooperation},
	author = {Ines Macho-Stadler and J. David Perez-Castrillo},
	journal = {Economics Letters},
	month = {Jan},
	number = {1},
	pages = {17--20},
	url = {http://www.sciencedirect.com/science/article/B6V84-458XRCC-3X/2/d1f0863968fa98b232cafbcd05519546},
	volume = {35},
	year = {1991},
	biburl = {http://www.bibsonomy.org/bibtex/259244c4f1b166e6c5a72a87a190722ae/smicha},
	description = {Economics Letters},
	keywords = {imported }
}